* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Microsoft YaHei', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

header {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

main {
    padding: 2rem;
}

.container {
    display: flex;
    max-width: 1400px;
    margin: 0 auto;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.left-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    border-right: 1px solid #eee;
}

.parameters-section {
    padding: 1.5rem;
    background-color: #f9f9f9;
}

.graph-section {
    flex: 1;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.right-panel {
    flex: 1;
    padding: 1.5rem;
    max-height: 100vh;
    overflow-y: auto;
}

h2 {
    margin-bottom: 1rem;
    color: #2c3e50;
    border-bottom: 2px solid #3498db;
    padding-bottom: 0.5rem;
}

h3 {
    margin: 1rem 0 0.5rem;
    color: #2980b9;
}

.parameter {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.parameter label {
    width: 60px;
    font-weight: bold;
}

.parameter input {
    flex: 1;
    margin: 0 10px;
}

.parameter span {
    width: 40px;
    text-align: center;
    font-weight: bold;
}

.function-display {
    margin: 1.5rem 0;
    padding: 0.8rem;
    background-color: #e8f4fc;
    border-radius: 5px;
    text-align: center;
    font-size: 1.2rem;
}

.key-points {
    background-color: #f0f7fa;
    padding: 1rem;
    border-radius: 5px;
    border-left: 4px solid #3498db;
}

.key-points p {
    margin-bottom: 0.5rem;
}

.canvas-container {
    flex: 1;
    position: relative;
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 5px;
    box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.1);
    min-height: 400px;
}

.knowledge-section {
    background-color: white;
}

.knowledge-content {
    padding: 0.5rem;
}

.knowledge-content ul, 
.knowledge-content ol {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.knowledge-content li {
    margin-bottom: 0.5rem;
}

footer {
    text-align: center;
    padding: 1rem;
    background-color: #2c3e50;
    color: white;
    font-size: 0.9rem;
}

@media (max-width: 992px) {
    .container {
        flex-direction: column;
    }
    
    .left-panel {
        border-right: none;
        border-bottom: 1px solid #eee;
    }
}